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The dissociation constants of formic aci...

The dissociation constants of formic acid and acetic acid are `1.77 xx 10 ^(-4) and 1. 75 xx 10 ^(-5)` respectively. Calculate the relative strengths of the two acids.

Text Solution

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`("Strength of Formic acid")/("Strength of Acetic acid") = sqrt ((K _(a) "Formic acid")/(K _(a) "Acetic acid") ) = sqrt ((1. 77 xx 10 ^(-4))/( 1. 75 xx 10 ^(-5))) = 3.18`
Thus, formic acid is `3.18` times stronger than acetic acid.
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